Much of the material about resistance activities during WWII prepared especially for a younger audience has concentrated on individuals and heroic group action without discussing the organizational aspects of the movement and the reasons for them. Mr. Seth describes the shock of invasion for Belgium, Holland, Denmark, France, Norway and the others and the daze which took a year or so to overcome. At the end of that year, each country was beginning to stir to resistance until at the end of the war, at least 2% of each occupied country's population was actively engaged in sabotage. The early efforts were hampered by lack of coordination and England became the headquarters for clearing plans. The practical necessities for resistance included communications (press and radio) forged documents, and supplies; the ideological included workers' strikes and sabotage. The author presents a sober account of the organization and control of the super-secret and energizes its history by concentrating on anecdotes about the very many young people who committed themselves to underground battles for their countries. The reader interest is always there.